2016/03/31 by Maitreyee Mukherjee, S. Basu, Sumit Basu +3
Physics and Astronomy · #Beam (structure) #Beam energy #Centrality #Charged particle #Collision #Critical point (mathematics) #Event generator #Heavy ion #High-Energy Particle Collisions Research #Ion #Large Hadron Collider #Multiplicity (mathematics) #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Statistics #hep-ex #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1088/0954-3899/43/8/085102
published as J. Phys. G: Nucl. Part. Phys. 43 085102 (2016) · 14 pages, 7 figures
openalex publication_date 2016/06/16 · arxiv created 2016/06/17 · arxiv updated 2016/06/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Multiplicity distributions of charged particles and their event-by-event fluctuations have been compiled for relativistic heavy-ion collisions from the available experimental data at Brookhaven National Laboratory and CERN and also by the use of an event generator. Multiplicity fluctuations are sensitive to QCD phase transition and to the presence of a critical point in the QCD phase diagram. In addition, multiplicity fluctuations provide baselines for other event-by-event measurements. Multiplicity fluctuation expressed in terms of the scaled variance of the multiplicity distribution is an intensive quantity, but is sensitive to the volume fluctuation of the system. The importance of the choice of narrow centrality bins and the corrections of the centrality bin-width effect for controlling volume fluctuations have been discussed. It is observed that the mean and width of the multiplicity distributions monotonically increase as functions of increasing centrality at all collision energies, whereas the multiplicity fluctuations show minimal variations with centrality. The beam-energy dependence shows that the multiplicity fluctuations have a slow rise at lower collision energies and remain constant at higher energies.